The sky is blue, and the dark plume of smoke reaches to the sky.

Smoking is Chen Zheng's air-drying room. It is very simple, there are not even walls, and some are just "pergolas" made of wooden shelves and planks. Coupled with the smoke from the "drying room", at first glance you think it's smoke.

In fact, Chen Zheng's own creativity is borrowed from the smokehouse for making bacon, but with a slight change.

In fact, it is nothing else that is smoking, it is the carbonization pool that Chen Zheng has widened and lengthened. Rows of wooden stakes are driven on both sides of the carbonization pool, and live beams are crossed over the smoke pond and erected on the wooden piles.

Next, Chen Zheng laid two palm-wide planks on the wooden beams one by one, leaving a three-finger-wide gap in the middle, and then set up another beam on the top, and finally spread hay on it.

Such a smoked pond with air leaks on all sides is complete.

It looks simple and simple, but in fact, it took Chen Zheng two whole days to play for such a simple game.

The first is ground temperature.

If the beams supporting the planks are too close to the ground, they will easily be roasted and caught on fire after a long time, but if they are too far away, the temperature will not be lifted at all when the cold wind blows, and all the adobes placed on them will freeze and crack.

On the other hand, the height of the hay beams has also been adjusted countless times, and if it is too high, the temperature is not enough, and the bottom of the mud bricks is dried, but the top is frozen and cracked. And if it is too low, it will allow more grass blades to fall on the adobe bricks that are still sticky, reducing the airtightness of the finished adobe bricks.

However, the project was completed in the end, although later than expected, but the previous idea was fully completed.

First, the carbonization pool is used to make charcoal as fuel, and then the waste heat of the carbonization pool is used to slowly dry the adobe bricks.

In order to synchronize the two sides, Chen Zheng inevitably adjusted the height of the wooden frame, and this was the fundamental reason why Chen Zheng spent two whole days.

However, the process is like this, it consumes a lot of time, energy and materials before it is explored, but when it is explored, the next production just needs to be done in strict accordance with the process, which is both worry-free and labor-saving.

This process, which can improve efficiency to the extreme, is generally referred to as "standardization" and is one of the indispensable conditions for industrialization.

The carbonization pond can produce three or four tons of charcoal in more than 30 hours, and nearly 1,000 adobe bricks. Counting the time of beating, receiving, and cleaning, it is exactly two days to kiln carbon and bricks.

Chen Zheng roughly calculated the dosage, and consciously lowered the ideal blast furnace of more than 4 meters to less than 3 meters, and the diameter of the blast furnace from more than 3 meters to less than 2 meters. In addition to a drastic reduction in copper production, the consumption of time and materials is also significantly reduced.

There is nothing to say about building a blast furnace, it is nothing more than clearing out a dry and flat piece of land, and using adobe bricks to build a base.

However, due to the weather, the normal stacking method is not suitable here, because the mud used as a caulking material cannot be dried naturally.

In order to solve this problem, Chen Zheng lit a large bonfire in the inner circle of the "blast furnace" that had not yet taken shape, and six smaller bonfires in the outer ring.

Of course, just a few campfires will not solve the problem of inconsistent mud solidification time, although this will affect the final air tightness and service life, but this is also a solution that has no way. If you don't do this, Chen Zheng doesn't even have a usable blast furnace, so how can you talk about the life of the blast furnace?

Whether it is charcoal, brick burning, or building a blast furnace, it can be said that even chopping wood and making a fire is a very physically demanding heavy job. Since deciding to smelt copper, Chen Zheng has been tired like a dead dog every day.

In the case of Chen Zheng's classmates, let alone chopping wood and moving bricks, they would be out of breath and didn't want to move when they wiped the ground, and according to Chen Zheng's workload, when the blast furnace was built, it was also the day when they vomited blood and died.

But no matter how tired you are during the day, as long as you hold the pendant at night and dream of the blue light of the starry sea, you will be a vigorous young man early the next morning.

After doing heavy work for a period of time, Chen Zheng obviously felt that his strength was becoming more and more exaggerated. Wrist-thick branches had to be dragged for a long time, and thicker logs had to be moved with the help of winches, ropes and sleds.

Now, Chen Zheng can easily carry a log more than three meters thick with a football ball. If this power is put on the earth, it should not be a problem to win a weightlifting championship or something.

Of course, correspondingly, while Chen Zheng's strength is growing, the amount of food is also getting bigger and bigger, and eating three or five catties of fish in a meal is just a cushion for the stomach, even if it is doubled, it is just just full.

Time passed day by day.

As the food gradually decreased, the earthen blast furnace that Chen Zheng had built gradually took shape. Eventually, a three-meter-high, bullet-shaped adobe blast furnace was formed! Except for the strange square hot air pipes, the rest of the parts look very similar to the small blast furnace of earth-based steelmaking.

Looking at his works, Chen Zheng was quite satisfied.

Connect the bellows to the cold air pipe, use putty mixed with large fish bone meal to make the air seal between the bellows and the cold air pipe, and finally install the wooden handrails to complete the work.

At this time, the blast furnace was already covered with charcoal, and in the center of the charcoal was stacked the red copper crystal that Chen Zheng had collected back and forth many times, Chen Zheng took a deep breath and threw the fire into it from the reserved inlet.

"Whew...... I don't know if it's going to work. ”

Although he has done so much work, Chen Zheng still has no bottom in his heart. Can the connection between the cold air duct and the hot air duct withstand the change of cold and heat? Can the cold air mix well with the hot air? Finally, the most important thing is that after Chen Zheng's technical transformation, can the charcoal, which is not of good quality, reach a high temperature of 1200 degrees?

None of this is still known.

If it weren't for the tons of fish and meat reserves, Chen Zheng really wouldn't have dared to spend so much time and so much energy to win that ethereal possibility.

However, if you don't fight, there is no possibility.

Could it be that Chen Zheng wanted to huddle in a snow cave, like a wild man, for food, go out early and return late every day to look for possible prey, and then starve to death in the snow cave one day, and wait until the snow melts in the spring, leaving a highly decomposed corpse.

Or if you fail in the hunt, you will die in the mouths of some powerful monsters, and become a piece of stinking feces to nourish this strange land......

That's not what Chen Zheng wants.

Especially when he discovered the magic of the strange fish crystal, Chen Zheng didn't want to die in this land even more.

He's going back, and he's going to look good at those who are chasing him.

After so many days, there are some things he has thought clearly.

The first priority is to stay alive.

Stay alive and wait.

Waiting for those who hunt him down.

Didn't they want this pendant? Aren't they able to transcend time and space?

As long as he continues to live, sooner or later he will wait until the forces chasing him send people again, and by that time......

…… Chen Zheng wants to tell them who is the prey!